EP0730748A1 - Spleisskassettenanordnung - Google Patents

Spleisskassettenanordnung

Info

Publication number
EP0730748A1
EP0730748A1 EP95932831A EP95932831A EP0730748A1 EP 0730748 A1 EP0730748 A1 EP 0730748A1 EP 95932831 A EP95932831 A EP 95932831A EP 95932831 A EP95932831 A EP 95932831A EP 0730748 A1 EP0730748 A1 EP 0730748A1
Authority
EP
European Patent Office
Prior art keywords
fibre
splice
leaf
tray
adaptor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95932831A
Other languages
English (en)
French (fr)
Inventor
Peter David Jenkins
Simon Charles Tristan Benton
Roger Erwin Jung
Brian Gregory
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marconi UK Intellectual Property Ltd
Original Assignee
Telephone Cables Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB9419483A external-priority patent/GB9419483D0/en
Priority claimed from GB9506505A external-priority patent/GB2299409B/en
Application filed by Telephone Cables Ltd filed Critical Telephone Cables Ltd
Publication of EP0730748A1 publication Critical patent/EP0730748A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4453—Cassettes
    • G02B6/4454—Cassettes with splices
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4452—Distribution frames
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4453—Cassettes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4453—Cassettes
    • G02B6/4455—Cassettes characterised by the way of extraction or insertion of the cassette in the distribution frame, e.g. pivoting, sliding, rotating or gliding
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4471—Terminating devices ; Cable clamps

Definitions

  • This invention relates to a splice tray for accommodating optical fibres
  • the splices have to be stored carefully and with an ample supply of fibre on either side of the
  • fibres are normally routed in fibre
  • the invention provides a splice tray tor accommodating optical fibres
  • tray composing a body with a plurality of splice holders at fixed locations thereof, the bod ⁇
  • each holder having fibre access points with which fibre can enter and leave the body, and fibre paths on the body leading from the access points to and from each splice holder, each holder being adapted
  • At least some of the splice holders are removably mounted at the fixed
  • a fibre storage chamber is provided to accommodate lengths of fibre, and fibre
  • paths on the body provide routes between each splice holder and the chamber.
  • auxiliary fibre storage chamber may be provided at one end of the body
  • Optical fibre associated with each splice may be stored in one of the chambers on the tray. However some of the splice holders may support a fibre storage leaf upon where fibre for
  • the respective splice is stored Preferably the leaf is hmgedly secured to a base part
  • the invention provides a splice tray for accommodating optical fibres, the tray comprising
  • each leaf having means tor receiving and retaining a splice and a length of fibre either side of the splice, wherein each leaf also has windows through the leaf material, with fibre guides on the leaf arranged so that a fibre on each side of the splice traverses
  • the leaf being adapted to receive an adaptor by which a clip on power meter
  • the invention also provides a method of measu ⁇ ng the transmissivity of an
  • optical fibre wherein the fibre is located on a leaf hinged to a splice tray body and the leaf has
  • the window the method composing the steps of fitting an adaptor to the leaf so that a window
  • the adaptor to take readings of the transmissivity of the fibre
  • the invention also provides an adaptor for providing an interface between a clip on
  • the adaptor having windows therethrough for the operation of a meter and plates for mounting on opposite faces of the leaf to allow a meter to be brought
  • the invention also provides an optical fibre clamping device for preventing relative
  • the device composes a one piece moulding including two parts connected by a hinge
  • optical fibre The invention will now be further described, by way of example, with reference to the
  • Figure 1 is a perspective view of the body of a splice tray in accordance with the
  • Figure 2 shows schematically some fibre paths on the tray body
  • Figure 3 is a perspective view of the body of Figure 1 with splice holders in the form of
  • Figure 4 shows more detail of one of the hinged leaves
  • Figure 5 is a detail of part of the fibre guide arrangement of the hinged leaf of Figure 4.
  • Figure 6 shows on a larger scale the engagement between the leaf of Figure 4 and the tra
  • Figures 7 and 8 illustrate the way in which fibre is loaded onto a hinged leaf
  • Figure 9 is a perspective partial view of the body of a splice tray with a different type
  • Figure 10 is a perspective view of an alternative splice tray and splice holder arrangement.
  • Figure 10a is a perspective view of part of the tray shown in Figure 10:
  • Figure 11 shows an adaptor for adapting the leaf to the requirements of a clip on meter
  • Figure 12 shows the application of the adaptor to a hinged leaf
  • Figure 13 shows the adaptor in place and ready for a reading to be taken.
  • the tray body 10 shown in Figure 1 is a plastics moulding which has fibre access ports
  • the access ports are constructed so that fibre can be laid into the ports, rather
  • the body 10 is made up of two components, namely a main upper housing 18 and a
  • a dark fibre pocket 22 is defined between the upper and lower
  • fibre storage area 21 is formed at the front end of the tray.
  • Fibre stored in the pocket 22 or in the area 21 will expand radially, when released, as a result of its natural elasticity and will come to lie against the outer peripheral edges of the pocket or of the storaee area 21. In the area 21. the fibre coils will be retained under retention fin ⁇ ers 24. 24a.
  • the space 26 includes
  • upstanding posts 28 which locate and retain splices and/or leaves.
  • Many tracks (for example 40.
  • moulded fibre tracks are set up to ensure that the fibre is never bent through a radius smaller than
  • Figure 2 shows two fibres 32. 34 entering the tray
  • fibre 32 is shown by a thick line and the other fibre 34 is shown by a thin line.
  • Figures 32 and 34 are live fibres. The thickness of these lines is purely for illustration purposes. In fact both fibres may be of the same thickness. Before they enter the tray, the fibres are protected by protective sheaths 36.
  • the fibre 32 first of all travels through a track 42 and crosses the upper surface of the tray through a splice holder (not shown) located on upstanding posts 28. The fibre then passes
  • the other fibre 34 follows a similar path.
  • the fibres are connected by a splice 30 which is made by a splicing tool, known in the art.
  • a splicing tool known in the art.
  • the splice itself is contained within a rigid, cylindrical
  • This method of storing live fibre on the tray in the pocket 21 is known as multi-fibre
  • live fibre can be stored in single loops
  • Figure 3 shows the tray 10 with a number of fibre storage leaves 46 hinged to the tray.
  • the leaves 46 are all shown inclined backwards, in a storage position, but it will be understood
  • each leaf can be individually hinged about an axis parallel to the plane of the tray body 10.
  • leaf can be hinged forwards; those behind can be hinged backwards and the desired leaf can be held in an upright position so that access can be achieved to that leaf and to the fibre thereon.
  • FIG. 4 shows details of one leaf 46.
  • a loop storage part of the leaf is vacuum formed
  • the leaf has a raised circular capstan 48. the radius of which is equal to the
  • a loop of fibre is held in an area generally
  • the leaf includes two windows 54, 56 across which the fibre is to be passed. Each of the
  • windows 54. 56 is in register with a fibre track 58. 60 and the tracks include retaining slots
  • the leaf is provided with locating holes 64. the function of which will become apparent later on.
  • the leaf has hinged retaining doors 66 connected by membrane hinges at 68 to the main part of the leaf.
  • the doors have tongues 70 which can be flexed to engage in retaining apertures
  • base unit 74 is used. The base unit
  • Figure 6 shows, on a scale larger than that used in the preceding figures.
  • the base unit has a triangular region 76 with three studs 78 which are positioned
  • the ramps 84 guide the fibre from the tracks 42 up into the fibre loop control leaf 46.
  • Adjacent the hinge on the base 74 is a channel 86 for receiving a splice 30, and a
  • retention tab 88 is fitted so that the splice can be snapped into the channel 86 and retained there.
  • FIGS 7 and 8 show the way in which the tray will be used to accommodate fibres.
  • the fibre 32 comes onto the tray through a sheath 36. passes along a track 42, up a ramp
  • the window 56 is generally as required, passes across the window 56 and around the capstan 48
  • the other fibre 34 follows a path which is similar to that of the fibre 32. but a mirror
  • Figure 12 shows the completed leaf 46 with the fibre and its splice 30 stored thereon.
  • Figure 9 shows a partial perspective view of a tray together with a different type of splice holder.
  • a splice reinforcer 30 is retained inbetween a space defined between two bar like retaining elements 100.
  • Each retaining element 100 is formed from a plastics
  • a hole 102 is provided at each end of the member 100
  • a notch 103 is provided so that, when two such members are inserted side by side a
  • splice reinforcer 30 inserted in the space defined between them can be removed.
  • Figure 10 shows a different type of splice tray body of generally similar construction to
  • the protective bend limiting tubes 36 are connected to the tray body by
  • each clip device 105 comprises a one piece moulding which includes two substantially identical halves 105a. 105b connected by a hinge 105c. The
  • the tube 36 includes axially spaced ring like grooves 107 and the device includes
  • a pair of jaws 108 are provided at the other end of the device and are arranged to gently nip
  • optical fibre 32 to prevent it from being pulled through the device, but without causing
  • the bend limiting tube 36 is secured by closing the device from an
  • splice holder As shown two types of splice holder are provided, a simple one 100 of the type shown in Figure 9, and also a splice holder 1 10 comprising a fibre storage leaf 1 1 1 hingedly attached to a base part 1 12.
  • the fibre storage leaf 1 1 1 incorporates windows 1 13 for attachment
  • the splice holder 1 10 may
  • both the loop storage part 1 1 1 and the base part 1 12 may be made as a single injection moulded part.
  • the body 104 contains a plurality of opposed inwardly extending convex recesses 1 15 which
  • Figures 1 1. 12 and 13 show how the resulting fibre circuit is checked and measured using
  • Clip-on meters used for this purpose are well known in the art.
  • Figure 12 shows the jig hinged open to be fitted onto the edge of a leaf 46.
  • studs 92 project through the locating holes 64 and a pair of v-shaped guides protrude through each of the windows 54. 56. As these guides pass through the windows, so they centralise the
  • the tray described can also be used with a fibre splitter.
  • a conventional splitter arrangement can be mounted below or otherwise adjacent to the tray body 10 and the split or broken out fibres can pass onto the tray through the fibre access ports 12. 14 or 16 or

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
EP95932831A 1994-09-28 1995-09-28 Spleisskassettenanordnung Withdrawn EP0730748A1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9419483 1994-09-28
GB9419483A GB9419483D0 (en) 1994-09-28 1994-09-28 A splice tray
GB9506505 1995-03-30
GB9506505A GB2299409B (en) 1995-03-30 1995-03-30 Optical fibre clamping device
PCT/GB1995/002311 WO1996010203A1 (en) 1994-09-28 1995-09-28 A splice tray

Publications (1)

Publication Number Publication Date
EP0730748A1 true EP0730748A1 (de) 1996-09-11

Family

ID=26305700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95932831A Withdrawn EP0730748A1 (de) 1994-09-28 1995-09-28 Spleisskassettenanordnung

Country Status (4)

Country Link
US (1) US5870519A (de)
EP (1) EP0730748A1 (de)
GB (1) GB2305739B (de)
WO (1) WO1996010203A1 (de)

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US5870519A (en) 1999-02-09
GB2305739A (en) 1997-04-16
WO1996010203A1 (en) 1996-04-04
GB9519775D0 (en) 1995-11-29
GB2305739B (en) 1998-11-04

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